This is just The Backrooms but with very, very bad writing. I empathise if English is not your first language, but hey, nobody was forcing you to make a game where the story is delivered almost exclusively through lengthy notes. If you don't know the difference between "shuddering" and "shuttering", then I'm sorry, but maybe you're just not ready to write for an anglophone audience yet. Give it a few more years.
And before someone accuses me of nit-picking minor typos and grammatical errors: no, the writing is bad in general. The theme of urban decay is extremely ham-fisted and unsubtle. If you need a character in your story to look directly at the audience and say lines like "looks like a flashback to the 'Golden Age of America', crazy how we thought these ugly sprawling walls were innovative and great" or "when the fads fade and the construction dries up — these places start to fall", I'm sorry, but you are a bad writer. Find other ways to communicate your ideas besides literally telling us!
Gameplay is just typical Backrooms stuff. Walk around a big, empty maze and find notes. At the end, there's a chase sequence with a monster that is slightly faster than you, so you essentially have to perfectly navigate the featureless environment. Run into even single dead end, and it's over; there's no chance to outrun or juke it in any way. So, of course, to ensure maximum frustration, there is no checkpoint before the chase, and you have to restart the game from the very beginning every time you fail.
I guess the one nice thing I can say is that the game runs well, though that's hardly a compliment when all it has to render is a bunch of empty hallways. And the demonic voice reading the final note managed to really startle me. That's it. Everything else is an uninspired, generic mess.
(Bonus: If you fall into any of the pits, you don't die. You're just stuck at the bottom, so you have to manually restart the game yourself.)